Electric switchgear apparatus with improved terminal means



4 Sheets-Sheet l 7 9 lm m m w wm Ww 9 0 O T. X G. O Mmm H o @i .mrim `4 m0. Tn m A F m J J. O. EXROAD ELECTRIC SWITCHGEAR APPARATUS WITH IMPROVED TERMINAL MEANS FIGJ.

June 20, 1967 Fiied Jan.

Jun@ 20, 1967 J. o. Hamam@ ELECTRIC SWITCHGEAR APPARATUS WITH 4 Sheets-Sheet if Filed Jan. 4, 1965 FIG-2.

June 20, 1967 1. o. REXRCAD 3,32'7,l76

ELECTRIC SWITCHGEAR APPARATUS WITH IMPROVED TERMINAL MEANS Filed Jan. 4, 1965 4 SheetS-Sheet 5 32', FIG. 3. 39 23 7 72 J. O. REIXRO/MD SWITCHGEAR APPAHA' `lune 20, i967 F S WITH ELECTRIC IMPROVED TERMINAL MEANS 4 Sheets-Sheet L Filed Jan.

United States Patent O ELECTRIC SWITCHGEAR APPARATUS WITH IMPROVED TERMINAL MEANS James 0. Rexroad, Beaver, Pa., assignor to Westinghouse Electric Corporation, East Pittsburgh, Pa., a corporation of Pennsylvania Filed Jan. 4, 1965, Ser. No. 423,058

12 Claims. (Cl. 317-119) This invention relates generally to electric switchgear apparatus and more particularly to enclosures of the type having terminal means therein for permitting electrical connection between cables that may be extended into the enclosure and a circuit breaker that may be removably mounted within the enclosure.

An object of this invention is to provide an improved enclosure having terminal means therein adapted to provide for quick removable connection between a circuit breaker that may be removably mounted in the enclosure and a plurality of cables that may be extended into the enclosure.

Another object of this invention is to .provide an enclosure having improved terminal means therein comprising a plurality of separate multi-cable terminals.

A further object of this invention is to provide an improved enclosure comprising a plurality of terminal means adapted to provide for electrical connection beltween a circuit breaker that may be supported in the enclosure and a plurality of electric cables that may be extended into the enclosure, which terminal means may be removably mounted in the enclosure by a worker operating through the front enclosure opening.

Another object of this invention is to provide an improved combination comprising an enclosure having improved terminal means therein and a circuit breaker connected to the termina-l means.

The invention both as to structure and operation, together with additional objects and advantages thereof, will be understood from the following detailed description when read in conjunction with the accompanying drawings, in which:

In said drawings:

FIGURE 1 is a front elevational view, with parts broken away, of a wall-mounted control device constructed in `accordance with principles of this invention;

FIG. 2 is a front elevational view of the control device of FIG. 1 which device is shown with parts broken away and with only the outline of a circuit breaker structure shown in dot-and-dash lines;

FIG. 3 is a sectional view taken generally along the line III- III of the device seen in FIG. 2 with the circuit breaker structure and cover of the device in place and with part ofthe cover being shown in side elevation;

FIG. 4 is a sec-tional view taken generally along the line IV-IV of FIG. 2 of the device seen in FIG. 2 with the cover of the enclosure broken away and with part of the circuit breaker structure broken away;

FIG. 5 is a side elevational view of one of the terminal devices seen in FIGS. 2 4;

FIG. 6 is a schematic view of the in FIG. V3;

FIG. 7 is a view similar to FIG. 2 and with parts broken away, of a modied form of the invention;

FIG. 8 is a view taken generally along the line VIIIVIII of FIG. 7 with part of a circuit breaker structure being shown in place; and

FIG. 9 is a front elevational view of one of the circuit breaker terminals disclosed in FIG. 8.

Referring to the drawings, there is shown in FIGURE 1 an electric control device 3 mounted on a wall 5 by means of four screws 7 that pass through suitable opencircuit breaker shown 3,327,176 Patented June 20, 1967 ICC ings in two ilanges 9 and that are threaded into tapped openings in the wall 5. The electric control device 3 comprises a housing or enclosure structure 13 (FIG. 3) and a circuit breaker 15 that is mounted in the enclosure structure 13 in a manner to be hereinafter specifically described.

The enclosure structure 13 (FIGS. 2-4) comprises a bottom part or receptacle 17 and a top part or cover part 19. The bottom part 17 is a sheet-me-tal structure cornprising a base or back 21,-two end walls 23 and two side walls 25. As is seen in FIG. 3, the back 21 is welded or otherwise suitably secured to the end walls 23 and the ilange parts 9 at the two opposite ends of the structure are integral with the end walls 23. The side walls 25 are formed integral with the back 21. Two angle members 27 (FIG. 3) are provided in order to stiien the end walls 23.

The top part or cover part 19 of the enclosure structure 13 comprises a sheet-metal structure comprising a front 31, two end walls 33 and two side walls 35. Two angle members 37 (FIG. 3) are provided to stiifen the wall 33 and to position the cover part 31 when the cover part is moved into the mounted position disclosed in FIG. 3. The members 37 limited inward mounting movement of the cover part 31 to thereby align the openings in the cover part 31 and back part 21 for reception of a .plurality of screws 39 that are used to secure the cover part 19 to the back part 17.

Two elongated insulating support members 41 are xedly secured to the base 21 of the back part 17. Each of the members 41 is provided with two tapped openings at each of the two opposite ends thereof. Two elongated insulating support members 43 are supported on the members 41. Each of the support members 43 is removably secured to the two opposite support members 41 by means of four screws 45 that pass through suitable openings in the support 43 and that are threaded into the tapped openings in thesupport members 41. Three terminal support bracket members 47 are secured to each of the insulating supports 43. Each of the support brackets 47 comprises a generally U-shaped rigid metallic bracket member that is secured at the bight portion thereof to the associated insulating support 43 by means of two bolts 49 (FIGS. 3 and 4) that pass through openings in the bracket 47 and support 43 and that are threaded into nuts 51 (FIG. 3) that are seated and captured against rotation in suitable openings in the support 43. The nuts 51 are placed in the openings 53 from the back of the supports 43 before the supports are mounted on the support members 41.

A separate solderless termin-al connector 55 (FIG. 5) is -secured to each of the six brackets 47 by means of two bolts 57 (FIG. 4) that extend through suitable openings in the side walls of the associated U-shaped bracket 47 and through suitable openings 59 (FIG. 5) in the terminal connector 55. The bolts 57 are secured in place by means of nuts 58. Each of the terminal connectors 55 is a a rigid conducting member. Each of the members 55 i-s provided with tive openings 61 that extend therethrough for receiving veconducting lines 63 of cables 65. Each cable 65 comprises an insulating cover 67 an-d the conducting line part `63. Each lof the terminals 55 (FIG.` 5) also comprises ve tapped openings 71 therein each of which tapped openings 71 leads into the space of the openings 61. As can be seen in FIG. 5, the centerline of each ofthe opening-s 71 is normal to and intersects with the centerline of the associated opening 61. As can be seen in FIG. 4, -ve of the cables 65 are connecte-d to each of the terminal structures 55 by means of ive threaded screw-type pressure connectors 75. Each of the connectors 75 is threaded into an associated tapped opening 71 and tightened to a position lto `etlect a pressure engagement of onev between the conducting line part 63 of one of the cables 65 and the associated terminal member 55. As is seen in FIGS. 2 and 3, there are three terminal members 55 mounted to each of the insulating supports 43 to provide for electrical connection of three line terminals `and three load terminals of a three-pole circuit breaker. As is seen in FIGS. 2 and 3, the cables 65 are brought into the oppo-site end walls 23 of the enclosure bottom part 17 to provide a straight-through type wiring arrangement. The cables 65 extend through suitable openings in bushing members 77 that provide access to the interior of the receptacle or enclosure struct-ure 13.

As is best seen in FIGS. 2 and 4, a conducting neutral terminal assembly structure 81 comprise-s an elongated rigid conducting bar 83 having ten openings 85 therein for receiving five incoming neutral cables -65 and ve outgoing neutral cables 65. Ten screw-type pressure connectors 87 are threaded into tapped -openings in the side of the member 83 to effect a pressure connection between the ten cables 65 and the member 83. The conducting terminal member 83 is supported on an insulating support member 91 by means of screws 93 (FIG. 4). Screws 95 (FIG. 4) are used to secure the insulating member 91 to four brackets 97 that are welde-d or otherwise xedly secured to the housing sidewall 25. A grounding solderless terminal connector 98 -of a type well known in the art is fixedly secured to the bar 81.

The circuit breaker L15 is a molded-case type circuit breaker comprising an insulating housing 103 and an insulating toggle handle 105 extending out through a suitable opening in the front of the housing 103. The handle 105 is movable between two positions to Iopen and close the circuit breaker. The circuit breaker is of the type that is specifically described in the copending patent application of A. R. Cellerini, Ser. No. 305,792, filedAug. 30, 1963, now Patent No. 3,287,534. As is shown schematically in FIG. 6, the handle 105 is moved about a pivot 115 to move -a spring 117 over center to effect opening and closing of contacts 119, 121 in a well known manner. When the contacts 119, 121 are in the closed position, and an overload current passes through the coil 123, a plunger 125 of a solenoid 127 is moved to pivot a lat-ch member 129 to unl-atch the contact arm 131 whereupon `a spring 133 operates the contact arm 131 and contact 121 to the open position. The contact 121 is stoppe-d in the open position by means of a stop 132. The circuit breaker is reset by moving the handle l-105 to the full OFF position to relatch the lever 129 with the contact yarm 131. The circuit breaker is trip-free in that if the handle 105 is held in the closed position the circuit breaker will still trip open upon the occurrence of a tripping overload current through t-he breaker. Stop means 135 are provided to limit movement -of the handle 105 in both directions. Since the circuit breaker is fully described in -detail in the above-mentioned copending patent application of A. R. Cellerini, there is herein set forth only a schematic drawing and brief description of the mechamsm.

As can be seen in FIG. 4, the circuit breaker is only partly shown in this figure and, -for purposes of clarity, the circuit breaker is shown only in dot-dash lines in FIG. 2. As can be seen in FIGS. 2-4, the enclosure structure bottom part 17 comprises four generally U-shaped flanged bracket members 139 that are welded or otherwise secured at the flange parts thereof to the side walls 25 of the enclosure bottom part 17. The circuit breaker 15 is `suitably secured to two generally U-shaped metallic support members 141 by means -of four bolts 143 (FIGS. 3 and 4) that secure the breaker 15 to the bight portions of the two support members 1141. As can be seen in FIGS. 2-4, the opposite legs of each of the supports 141 extend into the openings in the supporting brackets 139 to removably mount the circuit breaker 15 on the enclosure bottom part 17. The -circuit breaker is removably secured to the terminal members 55 by means of a plu-rality of bolts 147. As can be seen in FIGS. 3 and 4, the circuit breaker 15 is a three-pole circuit breaker having three terminals 149 at the top thereof and three terminals 149 at the bottom thereof. Each of the terminals 149 is connected to one of the terminal members 55 by means of two bolts 147. Each of the circuit breaker terminals 149 is fixedly secured to the circuit breaker 15 by means of a set -of four bolts 151. Only two bolts 151 of each of two sets of bolts 151 are visible in FIG. 3. The four bolts'151 -of each setare disposed at the four corners of an imaginary square so that the associated terminal 149 may be secured to the circuit breaker in either of two positions wherein the terminal is rotated from the other position. The terminal mounting means is more specifically described in the aforementioned patent of A. R. Cellerini et al., Patent No. 3,287,534. Each of the upper terminals 149 is removably secured to a conductor 153 that is part of the circuit breaker 15. Each of the lower terminals 149 is removably secured to a conductor 155 that is part of the circuit breaker 15.

The circuit breaker handle (FIG. 3) is manually operated from outside of the enclosure 13 by means of an external operating handle 161 that is rotatably mounted on the front 31 of the enclosure to operate a connecting structure 163 (FIG. 3) that is mounted on the inner side of t-he front 31. The connecting structure 163 operatively connects the external handle 161 with the circuit breaker hand-le 105. A worker operating through the opening of the bottom part 17 of the enclosure 13 when the front part 19 and circuit breaker v15 are removed, can readily remove and replace the terminal members 55. Thus, if any ofthe terminal members are damaged or if it is desired to change the size of the terminal members a worker can replace the terminal members even though the enclosure 3 is mounted `on a wall 5 (FIG. 1). During the wiring operation the Worker can cut five cables to the desired length and then remove insulatiop from the ends of the cables and thereafter move one of the terminal members 55 up (or down) into the mounted position during which movement the five openings in the terminal member receive the uninsulated parts of the five stationary cables. Thus, if there is no (or little) axial movement or play available the cables need not be bent and distorted during the wiring operation. Moreover during the wiring operation those terminals that are not yet wired can be -left out of vthe enclosure and out of the way until they are to be wired. It may also be desirable to replace either the brackets 47 or the entire support and terminal structures comprising the supports 43, brackets 47 and terminals 55 which replacement is easily effected from the front part of the enclosure. As can be seen'in FIG. 4, with the terminal members S5 removed the bolts 49 can be removed to permit removal of the brackets 47, and the screws -45 are readily accessible to permit removal of the supports y43.

An advantage of having elongated terminals 55 with the attached cables spaced from front to ba-ck in the enclosure is that this structure permits arrangements wherein the terminal structures in one transverse row are by-passed by cables that are connected to the terminal structures of the other transverse row. It is to be noted, for example, that five cables disposed with the axes thereof spaced linearly from front to back can be extended between two terminal structures 55 and connec-ted to one of the lower (FIG. 2) terminal structures. Thus, it can be understood that with this by-passing feature, all of the cables could be brought into the enclosure 13 from either the bottom or the top of the enclosure. Moreover, at certain installations, all of the cables to be connected to the bottom transverse row of terminals can be brought into the enclosure from the top of the enclosure and all of the cables to be connected to the top transverse row of terminals can be brought into the enclosure from the bottom of the enclosure.

Another embodiment of the invention is ldisclosed in FIGS. 7 .and 8 wherein those parts that are the same as, or similar to, the parts disclosed in FIGS. 1-6 are identified by reference characters that are the same as those used in FIGS. 1 6 except that the identical or similar reference characters in FIGS. 7 and -8 are primed. As is seen in FIGS. 7 and 8, each of the insulating support members 43 is supported in the back part 17 of the enclosure structure 13 in a spaced relationship from the ba-ck wall 21. Each of the two insulating supports 43 is supported on two oppositely spaced bracket members 163 by means of two bolts 165 that cooperate with two nuts 167. Each of the brackets 163 is welded or otherwise fixedly secured to the associated side wall 25. As is seen in FIG. 7, six solderless terminal structures 169 are fxedly secured to the two insulating supports 43. Each of the solderless terminal structures 169 comprises a rigid elongated conducting member 171 that is lixedly secured intermediate the ends thereof to the associated insulating support 43 by means of four bolts 173 which cooperate with four nuts (not shown) that are disposed on the opposite side of the associated insulating support 43. Each -of the members 171 is provided with five linearly spaced openings 175 at one end thereof for receiving the conducting parts of five cables 65 (two of which are shown in FIG. 8). Each of the members 171 is provided with five tapped openings at the side of one end thereof that lead into the ve openings 175 and that are tapped in order to receive five threaded screwtype pressure connectors 177 that may be tightened to effect pressure connections between conducting line parts of cables 65 (FIG. 8) and the associated terminal member 171. Only two cables 65 are disclosed in dot-dash lines in FIG. 8. It can` be understood that at t-he installation as many as ve cables 65 can be brought into the enclosure and connected to each of the terminal members 171. Each of the members 171 is provided with four tapped openings 181 at the other end thereof for receiving four screws 183 (only two of which are shown at each connection in FIG. 8) that mount the circuit breaker terminal device 185 to the connector 169.

Referring to FIGS. 8 and 9, each of the terminal devices 185 comprises a lrigid conductor formed to provide a generally planar flat lower part 187, a generally planar at upper part 189 and a neck part 191 connecting the lower part 187 with the upper part 189. The flat connecting surfaces of the lower part 187 and upper part 189 are disposed along generally parallel planes. As can be seen in FIG. S, the lower part 187 of the terminal device 185 is lixedly 'connected to the terminal member 171 by means of the four screws 183, The upper part 189 of each terminal device 185 engages the under flat surface of a circuit breaker conductor and is connected thereto by means of four screws 151.A The upper termina'l device 185 (FIG. 8) is connected to a circuit breaker conducting 'terminal member 153 and the lower terminal device 18S is connected to a circuit breaker conducting terminal member 155. The circuit breaker 15 and terminal devices 185 are moved into and out of the mounted position seen in FIG. 8 as a unit to be connected to the terminal members 169 that are mounted within the enclosure 13. The circuit breaker 15 is mounted in the bottom part 17 of the enclosure 13' by means of two mounting brackets 141 that cooperate with the brackets 139 in the same manner as was hereinbefore described with regard to the first embodiment. As can be seen in FIGS. 7` and 8, the terminal members 171 are connected directly `to the insulating support members 43 and they may be readily removed by removal of the mounting bolts 173. It can be understood that the supports y43 may be removed merely by removing the bolts 165.` In the embodiment disclosed in FIGS. 7 and 8, the 'conducting cables 65 are bent over to extend into the openings in t-he terminals 169 in a direction generally normal to the direction of entrance of the cables into the enclosure 13. The pressure connectors 177 are readily accessible when the circuit breaker 15' is out of the enclosure 13.

The embodiment of FIGS. 7 and 8 also has the advantage that all of the cables can be brought into the enclosure from either the bottom or top of the enclosure. This embodiment also has the advantage that all of the cables to be connected to the bottom transverse row of terminals can be brought into the enclosure from the top and all of the cables to be connected to the top transverse row of terminals can be brought into the enclosure from the bottom. An additional advantage of the embodiment disclosed in FIGS. 7 and 8 is that the 90 bend in the cables permits more flexibility for axial movement into and out of the openings 17 5.

While the invention has been disclosed in accordance with the provisions of the patent statutes, it is to be understood that various changes in the structural details and arrangement of parts thereof may be made without departing from some of the essential features of the invention. It is desired, therefore, that the language of the appended claims be given as reasonably broad an interpretation as is permitted by the prior art.

I claim as my invention:

1. In combination, an enclosure, six solderless terminal structures supported within said enclosure in two spaced rows with three solderless terminal structures in each row, each of said solderless terminal structures comprising a conducting member having a plurality of conductorreceiving openings therein, each of said conducting members having a separate tapped opening therein for each of said conductor-receiving openings, a screw-type pressure connector for each of said tapped openings screwed into the associated tapped opening to effect a pressure connec: tion between said conducting member and a conductor that may be positioned in the associated conductor-receiving opening, each of said solderless terminal structures comprising a bolt-on type terminal part, a three-pole circuit breaker comprising an insulating housing and a circuit-breaker mechanism supported within said insulating housing, an operating handle at the front of said insulating housing operable to operate said circuit-breaker mechanism, six bolt-on type circuit breaker terminals sup-Y ported on said circuit breaker at the back of said circuit breaker in two spaced rows with three bolt-on type circuit breaker terminals in each row, and bolt means bolting said six bolt-on type circuit breaker terminals to said six bolton type terminal parts with each bolt-on type circuit breaker terminal bolted to a different one of said bolt-on type terminal parts.

2. The combination according to claim 1, said enclosure comprising a receptacle part, said receptacle part comprising a back part and side walls extending from said back part toward an open front, insulating support means supported in said receptacle part, said solderless terminal structures supported on said insulating support means, said bolt means being accessible for removal from the front of said receptacle part to permit removal of said circuit breaker, removable securing means removably securing said terminal structures to said insulating support means, said removable securing means being accessible for removal from the front of said insulating support means to permit removal of said terminal structures from the front of said receptacle part.

3. The combination according to claim 2, :said securing means comprising a rst securin-g means, a second securing means removably securing said insulating support means in said receptacle part, and said second securing means being accessible for removal from the front of said insulating support means to permit removal of said in-y sulating support means from the front of said receptacle part.

4. The combination according to claim 1, each of said conducting members comprising an elongated conducting member supported in proximity to the back end thereof on said insulating support means and extending toward said front opening, said conductor-receiving openings in each of said conducting members positioned such that the center lines thereof are spaced in the direction from back to front along the associated conducting member, the bolton type terminal part of each of said solderless terminal structures comprising a terminal part formed integral with the associated conducting member in proximity to the front of the associated conducting member.

5. A circuit breaker according to claim 1, said enclosure comprising a receptacle part, said receptacle part comprising a back part and side walls extending from said back part toward an open front, insulating support means supported in said receptacle part spaced from said back part, said solderless terminal structures removably supported on said insulating Isupport means, each of said plurality of conductor-receiving openings in each of said members being open in the direction of said back part, and each of said bolt-on type terminal parts comprising a part formed integral with the associated conducting member.

6. In combination, an enclosure comprising a receptacle part, said receptacle part comprising a back part and side walls extending from said lback part toward an open front, insulating support means supported in said receptacle part, a plurality of solderless terminal structures mounted on `said insulating support means, each of said solderless terminal structures comprising an elongated conducting member having a plurality of conductorreceiving openings therein and a separate tapped opening for each of the conductor-receiving openings, a screwtype pressure connector for each of said separate tapped openings screwed into the associated tapped opening to effect a pressure connection between the associated conducting member and a conductor that may be positioned in the associated conductor-receiving opening, each of said elongated conducting members comprising bolt-on type terminal meansin proximity to an end thereof for receiving bolt-on type connection with a circuit-breaker terminal, and securing means separate from said screw-type pressure connectors and accessible from the front of said receptacle part removably ysecuring said solderless terminal structures to said insulating support means.

.7. In combination, an enclosure comprising a receptacle part, said receptacle part comprising a back part and side walls extending from said back part toward the front of said receptacle part, a plurality of solderless terminal structures supported in said receptacle part, each of said solderless terminal structures comprising an elongated conducting member having a plurality of conductorreceiving openings therein, in each of said elongated conducting members the conductor-receiving openings disposed such that the center lines thereof are generally parallel and spaced in a direction at least from front to back in said receptacle part, each of said conducting members having a separate tapped opening therein for each of said conductor-receiving openings, a screw-type pressure connector for each of said tapped openings screwed into the associated tapped opening to effect a pressure connection between said conducting member and a conductor that may be positioned in the associated conductor-receiving opening, and each of said conducting members comprising a terminal part in proximity to the front thereof to enable connection of the conducting member with a circuit-breaker terminal device.

8. In combination, an enclosure, six solderless terminal structures supported within said enclosure in two spaced rows with three solderless terminal structures in each row, each of said solderless terminal structures comprising an elongated conducting member supported within said enclosure such that the -direction of elongation thereof is from front to back in said enclosure, each of said conducting members having a plurality of conductor-receiving openings therein which openings are spaced in the direction of elongation of the conducting member, each of said conducting members having a separate tapped opening therein for each of said conductor-receiving openings, a screw-type pressure connector for each of said tapped openings screwed into the associated tapped opening to effect a pressure connection between said conducting member and a conductor that may be positioned in the associated conductor-receiving opening, and each of said conducting members comprising a bolt-on type terminal part in proximity to the front end thereof, a three-pole circuit breaker comprising an insulating housing and a circuit-breaker mechanism supported within said insulating housing, an operating handle at the front of said insulating housing operable to operate said circuit-breaker mechanism, six bolt-on type circuit breaker terminals supported on said circuit breaker at the back of said circuit breaker in two spaced rows with three bolt-on type circuit Ibreaker terminals in each row, and bolt means bolting said six bolt-on type circuit breaker terminals to said six bolt-on type terminal parts with each bolt-on type circuit breaker terminal bolted to a different one of said bolt-on type terminal parts. t

9. In combination, an enclosure comprising a receptacle part, said receptacle part comprising a generally planar bac-k part and generally planar side wall means extending from said back part to an open front in a direction generally normal to the plane of said back part, said side wall means comprising two spaced generally parallel side walls and two spaced -generally parallel end walls, two rows of solderless terminal structures supported in said receptacle part in a spaced relationship with each of said rows extending generally in the direction from one side wall to the opposite side wall, each of said rows comprising a plurality of elongated conducting members supported in said receptacle part in a generally parallel relationship with a first end of each of said conducting members disposed in proximity to said back part and the other end of each of said elongated conducting members facing the opening at the front of the receptacle part, each of the conducting members ofa first of said two rows having a plurality of linearly spaced conductor-receiving openings therein with each of said conductor-receiving openings open at least in the direction of one of said end walls and each of the conducting members of the second of said two rows having a plurality of linearly` spaced conductorreceiving openings therein with each of said conductorreceiving openings open at least in the direction of one of said end walls, each of said conducting members having a separate tapped opening therein for each of the associated conductor-receiving openings, a screw-type pressure connector for each of said tapped openings screwed into the associated tapped opening to effect a pressure connection between the associated conducting member and a conductor that may be positioned in the associated conductor-receiving opening, and each of said conducting members comprising a terminal part in proximity to the front part thereof to ena-ble connection of the conducting member with a circuit-breaker terminal device.

10. In combination, an enclosure comprising a receptacle part, said receptacle part comprising a generally planar back part and generally planar side wall means extending from said back part in a direction generally normal to the plane of said back part to a front opening, said side wall means comprising two spaced generally parallel side walls, and two spaced generally parallel end walls, two rows of solderless terminal structures supported in said receptacle part in a spaced relationship with each of said rows extending generally in the direction from one side wall to the opposite side wall, each ofsaid rows comprising a plurality of elongated conducting members supported in said receptacle part in a generally parallel relationship with one end of each of said elongated conducting members disposed in proximity to said back part and the other end of each of said elongated conducting members facing said front opening, each of the conducting members of the upper of said two rows having .a plurality of linearly spaced conductor-receiving opening therein with each of said conductor-receiving openings open at least in the direction of one of said end walls and each of the conducting members of the lower of said two rows having a plurality of linearly spaced conductorreceiving openings therein with each of said conductorreceiving openings open at least in the direction of one of said end walls, each of the conducting members of a first of said rows having a separate tapped opening therein for each of the associated conductor-receiving openings with each of said tapped opening open in the direction of one of said side walls, each of the conducting members of the second of said rows having a separate tapped opening therein for each of the associated conductor-receiving openings with each of said tapped opening open in the direction of one of said side walls, a screw-type pressure connector for each of said tapped openings screwed into the associated tapped opening to elect a pressure connection between sai-d associating conducting member and =a conductor that may be positioned in the associated conductor-receiving opening, and each of said conducting members comprising a terminal part to enable connection of the conducting member with a terminal device.

11. In combination, an enclosure comprising a receptacle part, said receptacle part comprising a lgenerally planar back part and generally planar side wall means extending from said back part in a direction generally normal to the plane of said back part toward a front opening, said side wall means comprising two spaced -generally parallel side walls and two spaced generally parallel end walls, two rows of solderless terminal structures supported in said receptacle part in a spaced relationship with each of said rows extending generally in the direction from one side wall to the opposite side wall, each of said rows comprising a plurality of conducting members supported in said receptacle part in a position spaced from said back part, each of said conducting members comprising a plurality of conductor-receiving openings therein which openings face generally in the direction toward said back part, each of said conducting members having a separate tapped opening therein for each of said conductor-receiving openings, a screw-type pressure connector for each of said tapped openings screwed into the associated tapped opening to effect a pressure connection between the associated conducting member and a conductor that may be positioned in the associated conductor-receiving opening, and each of said conducting members comprising a terminal part to enable connection of the conducting member with a terminal device.

12. In combination, an enclosure comprising a receptacle part, said receptacle part comprising a generally planar back part and generally planar side wall means extending from said back part in a direction generally normal to the plane of said back part toward a front opening, said side wall means comprising two spaced ,generally parallel side walls and two spaced generally parallel end walls, insulating support means supported in said receptacle part spaced from said back part, two rows of solderless terminal structures supported in said receptacle part in a spaced relationship on said insulating support means, each of said rows extending generally in the direction from one side wall to the oposite side wall, each of said rows comprising a plurality of conducting members, each of said conducting members comprising a conductor having a plurality of openings therein open in the direction of said back part, each of said conducting members having a separate tapped opening therein for each of said conductor-receiving openings with each separate tapped opening leading into adiierent one of said conductor-receiving openings, a screw-type pressure connector for each of said separate tapped openings screwed into the associated tapped opening to effect a pressure connection between the associated conducting member and a conductor that may be positioned in the associated conductor-receiving opening, each of said conducting members comprising a terminal part to enable connection of the conducting member with a terminal device, and at least one of said end walls having opening means therein for receiving a plurality of cables that may be extended into said opening between said planar back part and said conducting members which cables may Ibe bent generally and positioned in said conductor-receiving openings.

References Cited UNITED STATES PATENTS 2,308,290 1/1943 Linton 317-103 2,880,263 3/1959 Herrmann et al. 317-119 X 3,201,657 8/1965 Meacham 317-119 ROBERT K. SCHAEFER, Primary Examiner. W. C. GARVERT, H. O. JONES, Assistant Examiner. 

11. IN COMBINATION, AN ENCLOSURE COMPRISING A RECEPTACLE PART, SAID RECEPTACLE PART COMPRISING A GENERALLY PLANAR BACK PART AND GENERALLY PLANAR SIDE WALL MEANS EXTENDING FROM SAID BACK PART IN A DIRECTION GENERALLY NORMAL TO THE PLANE OF SAID BACK PART TOWARD A FRONT OPENING, SAID SIDE WALL MEANS COMPRISING TWO SPACED GENERALLY PARALLEL SIDE WALLS AND TWO SPACED GENERALLY PARALLEL ENDS WALLS, TWO ROWS OF SOLDERLESS TERMINAL STRUCTURES SUPPORTED IN SAID RECEPTACLE PART IN A SPACED RELATIONSHIP WITH EACH OF SAID ROW EXTENDING GENERALLY IN THE DIRECTION FROM ONE SIDE WALL TO THE OPPOSITE SIDE WALL, EACH OF SAID ROWS COMPRISING A PLURALITY OF CONDUCTING MEMBERS SUPPORTED IN SAID RECEPTACLE PART IN A POSITION SPACED FROM SAID BACK PART, EACH OF SAID CONDUCTING MEMBERS COMPRISING A PLURALITY OF CONDUCTOR-RECEIVING OPENINGS THEREIN WHICH OPENINGS FACE GENERALLY IN THE DIRECTION TOWARD SAID BACK PART, EACH OF SAID CONDUCTING MEMBERS HAVING A SEPARATE TAPPED OPENING THEREIN FOR EACH OF SAID CONDUCTOR-RECEIVING OPENINGS, A SCREW-TYPE PRESSURE CONNECTOR FOR EACH OF SAID TAPPED OPENINGS SCREWED INTO ASSOCIATED TAPPED OPENING TO EFFECT A PRESSURE CONNECTION BETWEEN THE ASSOCIATED CONDUCTING MEMBER AND A CONDUCTOR THAT MAY BE POSITIONED IN THE ASSOCIATED CONDUCTOR-RECEIVING OPENING, AND EACH OF SAID CONDUCTING MEMBERS COMPRISING A TERMINAL PART TO ENABLE CONNECTION OF THE CONDUCTING MEMBER WITH A TERMINAL DEVICE. 